Question

PLZ HELP IF U CAN PLZ I RILY NEED HELP

The earth's crust is _____.

thicker under the oceans than under the continents
in motion because of convection currents in the mantle
mostly made of iron and nickel
made of one large piece called the crustal plate

Answer 1

thicker under the oceans than under the continents

Answer 2

The upper part of the mantle is composed mostly of peridotite, a rock denser than rocks common in the overlying crust.